0.2 mol of a solute is dissolved to make 4 litres of solution. What is the molarity?

Answer and explanation

Correct answer: C. 0.05 M

  1. Step 1: Molarity is moles per litre: M. Answer: 0.05 M. Why not the others: 0.8 M: multiplies the moles by the volume. 20 M: inverts the ratio. 50 M: converts litres to millilitres wrongly.

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